Transport properties of high-temperature Jupiter atmosphere components

Bruno, D.; Catalfamo, C.; Capitelli, M.; Colonna, G.; Pascale, O. De; Diomede, P.; Gorse, C.; Laricchiuta, Annarita; Longo, S.; Giordano, D.; Pirani, Fernando

doi:10.1063/1.3495980

Cited by 70 publications

(53 citation statements)

References 59 publications

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“…The bracket integrals, after some transformations, can be expressed in terms of collision integrals X ðk;rÞ cndm calculated for each pair of excited electronic states n and m of atoms c and d. In the present study we calculate the collision integrals using the models proposed in [24] but taking into account increasing atomic radius (i.e. effective cross-section) of electronically excited atoms.…”

Section: Transport Coefficientsmentioning

confidence: 99%

State-specific transport properties of partially ionized flows of electronically excited atomic gases

Истомин

Кустова

2017

Chemical Physics

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a b s t r a c tState-to-state approach for theoretical study of transport properties in atomic gases with excited electronic degrees of freedom of both neutral and ionized species is developed. The dependence of atomic radius on the electronic configuration of excited atoms is taken into account in the transport algorithm. Different cutoff criteria for increasing atomic radius are discussed and the limits of applicability for these criteria are evaluated. The validity of a Slater-like model for the calculation of state-resolved transport coefficients in neutral and ionized atomic gases is shown. For ionized flows, a method of evaluation for effective cross-sections of resonant charge-transfer collisions is suggested. Accurate kinetic theory algorithms for modelling the state-specific transport properties are applied for the prediction of transport coefficients in shock heated flows. Based on the numerical observations, different distributions over electronic states behind the shock front are considered. For the Boltzmann-like distributions at temperatures greater than 14,000 K, an important effect of electronic excitation on the partial thermal conductivity and viscosity coefficients is found for both neutral and ionized atomic gases: increasing radius of excited atoms causes a strong decrease in these transport coefficients. Similarly, the presence of electronically excited states with increased atomic radii leads to reduced diffusion coefficients. Nevertheless the overall impact of increasing effective cross-sections on the transport properties just behind the shock front under hypersonic reentry conditions is found to be minor since the populations of high-lying electronic energy levels behind the shock waves are low.

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Section: Transport Coefficientsmentioning

confidence: 99%

State-specific transport properties of partially ionized flows of electronically excited atomic gases

Истомин

Кустова

2017

Chemical Physics

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“…In the present study, the terms r = p = 0; r = 1, p = 0; r = 2, p = 0; and r = 0, p = 1 are retained [2]. The transport coe©cients are expressed in terms of the expansion coe©cients: 10 ;…”

Section: Transport Coefficientsmentioning

confidence: 99%

“…The integrals Ÿ (l,r) cd are calculated using the data from [10] for all types of collisions: neutral neutral, neutral charged, and charged charged interactions. For the transitions between electronic states, there is no accurate data on the relaxation times, which is necessary for calculating integrals β.…”

Section: Transport Coefficientsmentioning

confidence: 99%

Transport properties of partially ionized atomic gases with electronic excitation

Истомин

Кустова

2013

Progress in Flight Physics

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Chemically nonequilibrium ionized gas mixture §ows of (N, N + , e − ) and (O, O + , e − ) with electronic excitation of neutral component are studied.The one-temperature model of transport properties taking into account electronic states of neutral atoms is developed. The transport coe©-cients of thermal and electrical conductivity, di¨usion and thermal diffusion, shear and bulk viscosity are calculated in the temperature range 500 50,000 K for various mixture compositions. Contribution of the electronic degrees of freedom to the transport properties is found to be important.

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“…In such cases, interfaces lead to strong concentration gradients and mixing. Many astrophysical situations also involve ionic transport in mixtures for the investigation of the composition of giant planets [8] and of the sedimentation of heavy elements in white dwarf stars [9], for instance.…”

Section: Introductionmentioning

confidence: 99%

Transport properties of an asymmetric mixture in the dense plasma regime

et al. 2016

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We study how concentration changes ionic transport properties along isobars-isotherms for a mixture of hydrogen and silver, representative of turbulent layers relevant to inertial confinement fusion (ICF) and astrophysics. Hydrogen will typically be fully ionized while silver will be only partially ionized but can have a large effective charge. This will lead to very different physical conditions for the H and Ag. Large first principles orbital free molecular dynamics (OFMD) simulations are performed and the resulting transport properties are analyzed. Comparisons are made with transport theory in the kinetic regime and in the coupled regime. The addition of a small amount of heavy element in a light material has a dramatic effect on viscosity and diffusion of the mixture. This effect is explained through kinetic theory as a manifestation of a crossover between classical diffusion and Lorentz diffusion.

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Transport properties of high-temperature Jupiter atmosphere components

Cited by 70 publications

References 59 publications

State-specific transport properties of partially ionized flows of electronically excited atomic gases

State-specific transport properties of partially ionized flows of electronically excited atomic gases

Transport properties of partially ionized atomic gases with electronic excitation

Transport properties of an asymmetric mixture in the dense plasma regime

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